Physica B: Condensed Matter, ( ISI ), Volume (403), No (1), Year (2008-7) , Pages (2431-2437)

Title : ( The effect of the post annealing temperature on the nano-structure and energy band gap of the SnO2 semiconducting oxide nano-particles synthesized by polymerized-complex sol-gel method )

Authors: M. M. Bagheri-Mohagheghi , Nasser Shahtahmassebi , MOHAMMAD REZA R. ALINEJAD , A. Youssefi , Mehrdad Shokooh-Saremi ,

Access to full-text not allowed by authors

Citation: BibTeX | EndNote

Nano-crystalline SnO2 particles have been synthesized by sol–gel process using a simple starting hydro-alcoholic solution consisting of SnCl4, 5H2O and citric acid as complexing and ethylene glycol as polymerization agents. The structural properties of the prepared tin oxide nano-powders annealed at different temperatures (300–700 1C) have been characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM) analyses. The XRD patterns show SnO2-cassiterite phase in the nano-powders, and size of crystals increases by increasing the annealing temperatures. The TEM images show nano-particles as clusters with size in the range of 5–25 nm. Electron diffraction pattern of nano-powders annealed at different temperatures shows a homogeneous distribution of spherical particles due to the effect of ethylene glycol as polymerizing agent in sol–gel process. The optical direct band gap values of SnO2 nano-particles were calculated to be about 4.05–4.11 eV in the temperature range 300–700 1C by optical absorption measurements. These values exibit nearly a 0.5 eV blue shift from that of bulk SnO2 (3.6 eV), which is related to size decrease of the particles and reaching to the quantum confinement limit of nano-particles.

Keywords

, Tin oxide; Nano, particle; Sol–gel method; Annealing
برای دانلود از شناسه و رمز عبور پرتال پویا استفاده کنید.

@article{paperid:1024434,
author = {M. M. Bagheri-Mohagheghi and Shahtahmassebi, Nasser and R. ALINEJAD, MOHAMMAD REZA and A. Youssefi and Shokooh-Saremi, Mehrdad},
title = {The effect of the post annealing temperature on the nano-structure and energy band gap of the SnO2 semiconducting oxide nano-particles synthesized by polymerized-complex sol-gel method},
journal = {Physica B: Condensed Matter},
year = {2008},
volume = {403},
number = {1},
month = {July},
issn = {0921-4526},
pages = {2431--2437},
numpages = {6},
keywords = {Tin oxide; Nano-particle; Sol–gel method; Annealing temperature},
}

[Download]

%0 Journal Article
%T The effect of the post annealing temperature on the nano-structure and energy band gap of the SnO2 semiconducting oxide nano-particles synthesized by polymerized-complex sol-gel method
%A M. M. Bagheri-Mohagheghi
%A Shahtahmassebi, Nasser
%A R. ALINEJAD, MOHAMMAD REZA
%A A. Youssefi
%A Shokooh-Saremi, Mehrdad
%J Physica B: Condensed Matter
%@ 0921-4526
%D 2008

[Download]